Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Observed and Forecast Precipitation for east Tennessee, southwest Virginia, and extreme southwest North Carolina

Observed Precipitation (Ground Truth):

Daily TVA Lake Basins Rainfall Information

National Daily Precipitation Totals (radar estimated)

Precipitation Forecasts:

Day 1 U.S. precipitation forecast [12Z to 12Z forecast = today/tonight] [00Z to 00Z forecast = tonight/tomorrow]

Day 2 U.S. precipitation forecast [12Z to 12Z forecast = tomorrow/tomorrow night] [00Z to 00Z forecast = tomorrow night/day after tomorrow]

Day 3 U.S. precipitation forecast [12Z to 12Z forecast = day after tomorrow/night after tomorrow night] [00Z to 00Z forecast = night after tomorrow night/two days after tomorrow]

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